I call SNAFU...

Skeleton mage hits Evaine for 11.71 fire damage.
Evaine hits skeleton mage for 42.56 physical damage.
Evaine killed skeleton mage!
Skeleton mage hits Evaine for 11.71 fire damage.
Skeleton mage killed Evaine!
You resurrect!

Sure, I resurrected, but what a waste of a life! I'm pretty sure enemies should stop attacking once they're dead!

Fire and poison are the gifts

Fire and poison are the gifts that keep on giving. :)

Ah...that was probably it.

Ah...that was probably it. Poison/fire damage really need to better clarify the culprit.

not only those...

...as some enemies just do not know when to stop, even if they are killed in the middle of their attack sequence (e.g. by riposte).

I do not have any log on hand, but i am fairly positive I have seen such behaviour in b18 - a series of attacks (e.g. from assault or other technique), enemy dies mid-serie due to ripostes or other passive damage source, yet the sequence continues till its end.

There is also a chance the

There is also a chance the mage casted a spell then you attacked and then the projectiles of the spell hit you. That has happened to me.

No chance at all. I was

No chance at all. I was meleeing him.

Actually

Actually, it is possible. NPCs get a turn at the same time you do - he could have easily cast a spell that turn [though it doesn't say he did thus he didn't]. But yes, Disease, Burning, Poison, Bleed are all DoT effects. And, they do say who caused it - the skeleton mage did. :D